Solenoid-operated antenna-switch



F. J. PETREQUIN. SOLENOID OPERATED ANTENNA SWITCH. APPLICATION FILED MAY 24, 1919.

Patented Mar. 23, 1920.

2 SHEETSSHEET I.

7 16 a a 2 g F. J. PETREQUIN. SOLENOID OPERATED ANTENNA SWITCH. APPLICATION FILED MAY-24,1919.

1,334,396. Patented Mar. 23, 1920.

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FREDERIC J. PETREQUIN, OF STE. GENEVIEVE, MISSOURI.

SOLENOID-OPERATED ANTENNA-SWITCH.

Specification of Letters Patent.

Patented Mar. 23, 1920.

Application filed May 24. 1919. Serial No. 299,396.

To all whom it may concern Be it known that I, Fnnonmo J. IETRE- QUIN, a citizen ofthe United States, residing at Ste. Genevieve, in the county of Ste. Genevieve and State of Missouri, have invented certain new and useful Improvements in Solenoid- Operated Antenna- Switches. of which the following is a specification.

This invention relates to improvements in electrical switches and more particularly to an improved antenna switch for use in connection with wireless apparatus.

One of the primary objects of the presentinvention is to provide a switch which may be readily controlled by the operator, at will. to throw into circuit the sending and receiv ing instruments of the wireless apparatus, the switch being so constructed as to operate to instantaneously bring either instrument into circuit with little effort on the part of the operator and with a minimum consumption of current.

Another object of the invention is to provide a switch of this class adapted to have all of its component parts arranged ina compact form upon a'single switchboard.

In the accompanying drawings:

Figure 1 is a plan view of the switch mechanism embodying the present invention;

Fig. 2 is a. front elevation of the same;

Fig. 3 is an end elevation;

Fig. 4 is a View in side elevation. parts being broken-away, illustrating one of the circuit closing devices provided in connection with the switch mechanism:

Fig. 5 is adiagrammatic view illustrating the circuits through the switch.

In the drawings the switchboard is indicated by the numeral 1 and mounted thereon in spaced relation and in axial alinement are two solenoid coils. one indicated by the numeral 2 and the other by the numeral Pairs of binding posts a and 5 are wired with the coils .2 and 3 respectively. and with line wires 6 leading from any suitable alternating current generator. In order that the circuit may be closed through coils 2 and 3 selectively. circuit closing devices preferably of the type shown in Fig. -l of the drawings are provided. Each of these devices, indicated in general by the numeral 7, comprises a base 8 designed to be secured upon the floor beneath the table upon which the switchboard 1 is mounted and in position where the said device may be conveniently reached by the toot of the operator. Mounted upon the base 8 within asuitable casing 9 provided thereon, is a contact 10 electrically connected wit-h one of the line wires 6, another contact member 11 being likewise mounted upon the base 8 within the easing 9 and electrically connected with an other terminal of the" same line wire. The contact member 11 is resilient and is arranged to coact with the contact member 10 in the manner clearly shown in the said Fig. 4, a push button 12 being fitted through the top of the casing 9 and being arranged when depressed to move the contact member 11 .into engagement with the contact member 10. The said top of the casing 2) is preferably inclined so that the button 12 is positioned at the angle most convenientfor its depression by the operatofs toot. As stated, one of these circuit closing devices is provided in connection with each of the coils 2 and 3 and consequently by depressing the button 12 of one or the other of the circuit closing devices. the circuit will be closed through the corre sponding coil thus energizing the same. Each coil is wound upon a spool i?) preferably of brass. and the tubular spools ot' the coils 2 and 3 are designed to slidably receive laminated cores 14 and 15 respectively. each of these cores preferably comprising a tubular body 16 of brass iuelosing a bundle of softiron wires 17.

At their inner or adjacent ends, the cores 14 and 15 are threaded or otherwise secured to the ends of a preferably square connectingbar 18 of any suitable insulating material. the cores being thus connected for simultaneous shitting movement so that when one of the coils is energized its respective core will be drawn thereinto thus shifting the connecting bar 18 in the corresponding direction. Secured upon the upper sideot thebarlSare transversely extending strips 19 and 20 of insulating material, the strips 19 being ar 'anged at the opposite sides of the strip 20. These strips 19 and 20 support bus-bars indicated one by the numeral 21 and the other by the numeral 22. Thus the bus-bars 21 and 22 are located at the opposite sides of and parallel to the bar 18 and are movable with the said bar. Arranged in the path of movement of the bus-bar 21 are relatively fixed contacts 23, 21 and 25, and similarly contacts 26, 27 and 28 are arranged in the path of movement of the bus-bar 22, the bus-bars being designed to slide over their respective contacts and the said bars 21 and 22 being at all times in electrical contact with the contacts 24 and 27 respectively. It will now be evident that when the solenoid coil 2 is energized the bus-bars will be shifted to the left in Fig. 1 of the drawings so that at such time the bar 21 will bridge the contacts 23 and 2-1 and the bar 22 will bridge the contacts 26 and 27. On the other hand when the solenoid coil 3 is energized, the bar 21 will bridge the contacts 24 and 25 and the bar 22 will bridge the contacts 27 and 28. As shown in Fig. 5 of the drawings, the contacts 23 and 26 are in circuit with the receiving transformer of the wireless apparatus indicated by the numeral 29 and the contacts 25and 28 are in circuit with the oscillation transformer indicated by the numeral 30. The contact 2; is in circuit with the antenna 31 and the contact 27 is in circuit with a ground wire 32. Spaced contacts 33 and 3-1 are arranged upon the switchboard 1 opposite the contacts 22 and 24, and other contacts 35 and 36 are similarly arranged opposite the contacts 2 and At the opposite side of the board contacts 37 and 38 are located opposite the contacts 26 and 27 and contacts 39 and 40 are located opposite the contacts 27 and 28. A switch blade 41 is secured to one end of the strip 20 and, when the solenoid coil 2 is energized to shift the bar 13 to the left in Fig. 1, engages between and bridges the contacts 33 and 34. the contacts 35 and 36 being engaged and bridged by the said switch blade 41 when the solenoid 3 is energized and the bar 18 is shifted to the right. Similarly a switch blade -12 is fixed at the other end of the strip 20 and in the first instance engages between and bridges contacts 37 and 3S and in the latter instance bridges the contacts 39 and 40. As will be seen by reference to Fig. 5 the contacts 33 and-3l are in circuit with the audion 43 and the contacts 37 and 33 are in circuit with the amplifier H. The contacts 35 and 36 are located in the motor circuit 4.?) of the rotary spark discharger and the contacts 39 and 40 are in the primary circuit with the sending transformer l6.

It will be readily appreciated that by providing the circuit closing switches shown cores of the solenoids, bus-bars supported at the opposite sides of the said member and movable therewith, contacts also located at the opposite sides of the said member and positioned in the path of movement of the said bus-bars, switch blades extending at the opposite sides of the said member and beyond the respective bus-bars, and other cont-acts positioned in the path of movement of the said switch blades.

In wireless transmission apparatus, a switch comprising space-d solenoids, means whereby the solenoids may be selectively energized, a member connecting the cores of the solenoids, a bus-bar arranged at one side of the member, a bus-bar arranged at the opposite side of the member, a switch blade extending at one side of the member, a

switch blade extending at the opposite side of the member, the bus-bars and switch blades being supported by and movable with the said member, antenna and ground contacts at all times in engagement with the first and last mentioned bus-bars respectively, receiving transformer contacts located at opposite sides of the line of movement of the member and positioned in the path of movement of the bus-bars when one of the solenoids is energized, audion contacts and amplifier contacts positioned respectively in the path of movement of the first and last mentioned switch blades when the said solenoid is energized, primary circuit and sending transformer contacts located in the path of movement of the first and last mentioned switch blades, respectively, when the other solenoid is energized, and oscillation transformer contacts located in the path of movement of the said busbars when the last mentioned solenoid is energized.

In testimony whereof I aflix my signature.

FREDERIO J. 'PETREQUIN. [1,. 8-] 

